0302.31.00.00 - Albacore or longfinned tunas (Thunnus alalunga)

This HTS classification, 0302.31.00.00, specifically covers fresh or chilled albacore or longfinned tunas, scientifically identified as belonging to the species *Thunnus alalunga*. These fish are characterized by their elongated pectoral fins, which are a distinguishing physical feature. This subheading falls under the broader category of fresh or chilled fish, excluding fillets and other fish meat of heading 0304, and more precisely within the group of tunas and skipjack tuna.

The distinction of this category from its siblings lies in its specific focus on the albacore tuna. For instance, while 0302.32.00.00 covers yellowfin tunas (*Thunnus albacares*) and 0302.33.00.00 pertains to skipjack tuna (*Katsuwonus pelamis*), this subheading is exclusively for *Thunnus alalunga*. The scientific name and characteristic physical attributes, such as the long pectoral fins, are key differentiators for proper classification.

As this is a leaf node within the HTS, there are no further subcategories. Therefore, the classification of fresh or chilled albacore or longfinned tunas is finalized at this level, with accuracy relying on the correct identification of the species and its presentation as fresh or chilled, whole fish.